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CVE-2026-62432 is a race condition in Xen event channel handling, tracked in XSA-505. The flaw is in the EVTCHNOP_expand_array hypercall, which checks whether FIFO event channels are enabled without holding the correct lock. Because this state check is not properly synchronized, EVTCHNOP_expand_array can race with EVTCHNOP_reset, leading to a NULL pointer dereference. The issue affects Xen versions 4.5 and later. The primary consequence is a Xen crash, and for x86 PV guests the resulting state corruption may also create a risk of memory corruption or possible privilege escalation.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.